Half marathons in Gwynedd
Find half marathons in Gwynedd in 2026/2027 - filter by date, location or category, display on a map or use the advanced search to find your perfect race.
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- Sun 1 Mar
- £46.99-£49.99
Jones o Gymru Anglesey Half Marathon
The most beautiful half marathon in North Wales! Flanked by breathtaking views of Eryri (Snowdonia), the beauty and uniqueness of this event is what draws people from all over the UK!
- 13.1 miles road running + 224 m ascent
- Sun 12 Jul
- £44.99-£49.99
Snowdonia Trail Half Marathon Eryri
Wales' spectacular mountain half marathon! A tough route with over 1,192m of ascent, most of which is up Wales’ highest peak, with incredible views all the way to Anglesey and a downhill finish too.
- 12.9 miles trail running + 3959 ft ascent
- Sun 1 Nov
- £39.99-£51.99
Anglesey Trail Half Marathon
Anglesey's most beautiful trail half, set in the stunning surroundings of Newborough Forest and Traeth Llanddwyn, which once hosted the Commonwealth Mountain and Ultra Distance Running Championships.
- 21.1 km trail running + 159 m ascent
- Sun 1 Mar
- £36-£42
St Davids Day Celebration North Wales Pilgrims Half Marathon | Half Marathon
- 21 km trail running
- Sat 4 Apr
- £28-£35
Aberdyfi Half Marathon | Half Marathon
- 21.1 km trail running + 850 m ascent
- Sun 13 Sep
- £35
Beaumaris Run Fest Weekend | Half Marathon
- 13.1 miles road running
- Sun 4 Oct
- £40-£42
Bangor City 10K & Half Marathon | Half Marathon
- 13.1 miles road running